Granted Patent
Utility
US 4,891,213 · App. 06/863,927
Nail enamel containing microcrystalline cellulose
Inventors:
Harry W. Gordon, Kenneth Chung
Patented Case
View Patent ↗
Granted: Jan 2, 1990
Filed: May 15, 1986
Inventors
Harry W. Gordon
Kenneth Chung
Assignee (at issue)
Del Laboratories, Inc.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.